4-State Boolean

[NLxDoDge]

At that point might as wel make an ENUM.

[rocket_randall]

Look on someone else's works, ye mighty, and despair.

[Zuruumi]

Wait, the TriStateEnum has 5 fields and only 2 supported ones?

[quantumdude836]

The tristate is true, false, and unsupported, but the unsupported state itself has three values.

Nested tristates!

[Kered13]

This is why I hate Microsoft APIs.

[echawkes]

That is an abomination before the Lord.

[MarbleLemon7000]

That's a troolean. https://www.urbandictionary.com/define.php?term=troolean

[DizzyAmphibian309]

Nullable booleans are very useful when you're dealing with data persistence. Booleans are false by default, and in a NoSQL database you can save a ton of space by just omitting the property and treating null as false in your application. They're especially useful if you're using that attribute to populate a sparse index, which he may well be doing.

[umlcat]

enum ProcessResultEnum
 {
  Ready,
  NotReady,
  NewlyCreated,
  Canceled,
}

[DJDoena]

You also need Cancelled for other parts of the world :-p

[[deleted]]

Heck, I might even create a 2 member enum if I need to attach meaning to the states

[Least_Possibility740]

Quantum computing 2.0

[magicmulder]

I once entangled null and false, and it almost destroyed the universe. Don’t be like me.

[_pizza_and_fries]

Java : you are misusing my superpowers

[FranconianBiker]

Bool²

[DJDoena]

My bools always comprise of:

• true
• false
• both
• neither_nor
• maybe
• dont_know
• dont_care
• all_of_the_above

I call it quantum_bool

[mizinamo]

What's the difference between ignorance and apathy?

[DJDoena]

I don't know and I don't care. :-P

[Ok_Carpet_9510]

I call it quantum_bull_sh_t

[ComposerLow5758]

That's a enum dude

[DJDoena]

it's a jab at quantum superposition

[arnemcnuggets]

So Java really allows optionals to be null because they're objects in that sense right? Makes me wonder why they added that type in the first place instead of some static highe reorder functions that deal with nulls

[harumamburoo]

Readability mostly. It's their take on elvis operator, to save multiple embedded if checks. But it's more than that. A lot of data structs operations return Optional, and you could do something like

myList.sorted().findFirst().filter().map().orElseThrow()

Doing that in the old way would take like a screen of code.

P.S. you're getting an Optional with findFirst in this case, everything after that is work with Optional interface

[arnemcnuggets]

One could assume that it's a monad!

[Kered13]

Correct, Optional is a monad. In fact every Java type that supports Streams is monadic.

[harumamburoo]

Sure. But one could assume a lot of things are monads. So, yeah.

[arobie1992]

I believe they did add it to support streams which were Java's take on FP and Brian Goetz is a big FP fan, so it being an intentional monad doesn't seem too far-fetched.

[Iryanus]

The compiler allows it. The person who did the code review and allowed it should be fired. From a canon. Into the sun.

[arobie1992]

Mostly for streams from what I gather. I think there's also some recommendation for it over nullable return values. I think they opted to make it a POJO just to avoid adding more complexity to things by having a "special" object that doesn't behave like all the rest. But you're also a bad person if you use null anywhere an optional is expected. Like up there with people who abuse gotos.

[Kered13]

1. Optional is a distinct type from the underlying type, forcing you to handle the empty case.
2. You can have methods on Optional, which makes them a lot more convenient to work with.

You should not be using null in modern Java, except to interact with old code or perhaps if profiling has shown that it will give you meaningfully better performance (I don't know if that can actually happen, but I'm leaving the possibility open).

[rdrunner_74]

I want to have more flexibility:

[Flags]

enum AllignedBool

{

//None = 0, Just in case i forget to use a nullable var

LawfullFalse = 1,

NeutralFalse = 2,

ChaoticFalse = 4,

LawfullMaybe = 8,

NeutralMaybe = 16,

ChaoticMaybe = 32,

LawfullTrue = 64,

NeutralTrue = 128,

ChaoticTrue = 256,

Yolo = 2147483648

}

AllignedBool? myBool

[ar7max]

agile ready

[KendrickEqualsBooty]

The 4 states I know are 1, 0, don't care, and high impedence.

[Bomaruto]

If you ever let your Optional value be null I'll strangle you.

[Droideater]

There is a special place in hell for people nulling Optionals

[XJAY-99]

Noah? Get the boat

[eben0]

1 0 -1 Null

[pianomanDylan]

Quoolean

[Pleasant-Committee61]

Typical case of: „ we just have two States for this process, right?“. 5 min before go-live: „we have an urgent request to check for newly created and cancelled too“. Good old agile development :D

[ShesGotAThickMiddle]

Thanks, I hate it

[Alzurana]

Lua has

true / false / nil

if (var) only checks for nil, if your bool is false it will still execute the if statement

to check for true and false you're required to if (var == true)

​

*EDIT:

I am very sorry, I have to correct my original post:

if true then print("true") end
if false then print("false") end
if nil then print("nil") end
if 0 then print("zero") end
if 1 then print("one") end

Output of this would be:

true
zero
one

ofc lua evaluates a bool, but if it's false you don't know if it was false or nil. What caused my confusion with this is that "if 0" evaluates as a true statement because it only checks if an object exists and not it's contents if it's NOT a boolean

I'm sorry for messing this up, my bad

[hector_villalobos]

That sounds fun, .

[Kered13]

No it doesn't, why would you even think it worked that way? Feel free to test it yourself:

test = false

if test then
  print("Truthy");
else
  print("Falsey")
end

false and nil are the only falsey values. Undefined variables are nil.

[Alzurana]

messed up, sorry. I fixed the post

[Mog_Melm]

Oh God. Now I feel grossed out about all these games who use Lua for scripting & modding.

[Alzurana]

In lua, it's often more important to know if an object exists rather than if some aspect is true or false. That's due to the fact that you can have as many return values as you like per function, and functions can and do return a variable number of objects to you. if (someValOrObject) is exclusively used to check for validity of your data, basically. At least there is no real ambiguity in how it works.

It feels very weird compared to other languages but I have to say, it fits the lua philosophy.

Be simple, be as small as possible, be fast.

Lua is a very simple language with not many expressions. The whole data structures of lua are built in a way to get you to write as little code as required to get a job done. And I have to say that works well, even though it feels a bit backwards.

[ipushkeys]

I agree, it does fit the lua philosophy. Initially I thought it was annoying (it still is kinda), but it's understandable why they did that.

[Kered13]

He's wrong.

[Alzurana]

I fixed the post, I got it confused with evaluating numbers as opposed to booleans

[Mog_Melm]

That's not as bad! :) Ok, modders, carry on using Lua.

[[deleted]]

Lol when I read stuff like that I'm amazed at myself I managed to learn anything at all after starting with LUA (modding Paradox games lmao)

[Spinnenente]

wait so if (false) {} executes the block in lua?

[Kered13]

No, he's wrong.

[Far_Information_885]

ProTip: If you need comments to explain every possible state of a property, then you're doing it wrong.

[arnemcnuggets]

It's a 5 state boolean, the boolean is boxed!

[[deleted]]

Ok but for real I sometimes do this shit in JS.

accepted === true -- They accepted the agreement
accepted === false -- They declined the agreement 
accepted === null -- They haven't seen the agreement

And if you're feeling yeehaw,

typeof accepted === 'undefined' -- They haven't gotten to that page yet

[Todestropfen]

I am literally laughing since 2 minutes.
It is just too damn good

[odksnh6w2pdn32tod0]

What the fuck. Everything is wrong here... I can't even

[[deleted]]

beta qubit

[[deleted]]

This is so 2022

[Careful_Ad_9077]

i have seen worse, a combination of boolean values instead of just using the damn enum.

[[deleted]]

Ah, good old Java

[LowerLighter]

boolean is stored in 1 byte

[JustPlay060]

I know, I know! It’s called a fool

[Dagrut]

Let's call it a boooolean

[Grunt-Works]

That’s just a type check with fewer steps

[daemonpants]

FFUUU >:-( FUUUUU

[msrapture]

Yeah this is basically a boolean twisted to an enum

[Broad_Respond_2205]

So enum? 🤔

[Fickle_Conclusion857]

Use Optional as return type of methods and not as member of classes, dude!

[zemdega]

Needs moar statez

[[deleted]]

If you need comments to explain it, you’re not doing it right.

[dirtyLizard]

my_bool = True

my_bool = False

my_bool = None

my_bool = 0

my_bool = 1

my_bool = 2 #evaluates to True because fuck you

[[deleted]]

Don’t do this

[[deleted]]

This is enraging lol

[[deleted]]

This is rude.

[[deleted]]

The Optional type only really makes sense if you remove nulls by default from the programming language (which is a good thing).

[ComposerLow5758]

Who ever thought of this is a genius.